strata support mining

Roof bolting and underground roof falls

The Coal Mine Health and Safety Act of 1969 [4] recognizes roof bolting as the sole means of underground entry (roadway) support.Subsequently with the development of roof bolters with rotary drilling, roof bolting for underground coal mine entry (roadway) support took off, replacing timber supports, and soon became the sole means of entry …

Mining Roof Support Systems | Strata Worldwide

Strata Worldwide was founded on its line of engineered secondary roof supports for underground mines. We offer options in timber, steel and concrete. With qualified product …

GROUND SUPPORT SOLUTIONS FOR UNDERGROUND …

Ground support solutions are essential foundations to the safety of today's underground mining operations. Our solutions provide underground operations support with cavity filling and consolidation of fractured ground and void spaces; strata control for stability of rock faces preventing rock fall and roof failures; and provisions for managing

Strata Worldwide in Mining, Tunneling & Maritime Industries

Strata is a pioneer of products and technologies that enhance and sustain underground connectivity, promote worker safety, and drive daily productivity for mining operations around the world. Our diverse clients, spanning six continents, have benefited from the Strata Advantage: leading edge technologies backed by world-class customer support.

Ground support and strata monitoring: what is needed?

Strata support in an underground excavation is a primary concern for miners. Geotechnical engineers choose the optimal ground support scheme based on the rock mass properties, design guidelines and their experiences. Ground support elements are installed to stabilise the excavation and are divided in two groups: reinforcement and surface support.

Controlling mine pressure by subjecting high-level …

Controlling mine pressure by subjecting high-level hard rock strata to ground fracturing. Research Article. Open access. Published: 23 January 2021. 8, 1336–1350 ( …

(PDF) FUNDAMENTALS OF COAL MINE ROOF SUPPORT

Roof bolt reinforcement of stratified carboniferous and fragile strata is a popular way of roof support in underground mines. The manifestation of strain energy of strata generated during coal ...

Effect of strata properties and panel widths on chock …

The selection of panel widths also depends on the chock capacities employed and geotechnical constraints of the mine. Higher support capacities can provide safer mining environments at the cost of capital investment, ... In a normal mining situation, the rock strata properties are expected to vary within the mining block as well as within a ...

A New Roof Strata Cavability Index (RSCi) for Longwall Mining

Maharana AK (2013) Study of strata and support behaviour of a longwall mine. Department of Mining Engineering, National Institute of Technology, Rourkela. Google Scholar Manteghi H, Shahriar K, Torabi R. (2012) Numerical modelling for estimation of first weighting distance in longwall coal mining—a case study.

Underground coal – ground or strata failure

or strata failure in the underground coal industry. It covered 18 mines between February 2022 and June 2022. Several key elements were assessed as part of thi s program that included, but were not limited to: Design process: • How strata support is designed and maintained • How factors of safety (FoS) are incorporated into the design

ANALYSIS OF THE INTERACTION BETWEEN MOBILE …

the mechanics of strata deformation, the authors have collected and reviewed measurements of convergence and stress in one western U.S. mine and have completed pseudo-three-dimensional, boundary-element modeling for two typical pillar-pulling plans. Stress distribution in the mine roof above pairs of MRS's was calculated to

About Us | Strata Worldwide

Join Strata Worldwide in Celebrating 30 Years! Strata Worldwide is a global company of innovative systems, products, and services. We specialize in technologies that have been built for the rugged, highly active working environments found in the mining, tunneling and maritime industries. Our goal is to become a partner to our customers, not ...

Overlying strata structural modeling and support

Overlying strata structural modeling and support applicability analysis for large mining-height stopes - ScienceDirect. Article preview. Abstract. Introduction. …

Comprehensive Study of Strata Movement Behavior in Mining …

Strata movement due to extraction of a longwall panel is of great significance both in terms of environment and ground control. Thick coal seam extraction is expected to severely disturb the overburden, which is critical. Most studies use only one or two methods to investigate strata movement that are not thorough or comprehensive. This paper …

Longwall roof control through a fundamental

Section snippets Load cycle analysis. A mechanistic consideration of how the support and strata interact indicates that there should be four basic pressure–time patterns to be observed, which will indicate when a support has the following: an adequate capacity and appropriate set pressure; adequate capacity and too high a set pressure; inadequate …

Sustainability | Free Full-Text | Overlying Strata Movement and Mine …

This will all provide a theoretical basis and technical support for designing green paste backfill mining, selecting key backfill equipment, and promoting support parameters and ecological mining. Researchers have studied the movement law of overlying strata and the appearance of mine pressures in backfill mining.

Mining | Special Issue : Mining Strata Control

For mining engineering purposes, strata control is defined as maintaining stability around the mine openings where operations are, or will be, taking place. Thus, mining and geotechnical engineers should study and understand strata load transfer behavior, failure modes, support systems load transfer mechanisms and installation …

5.2.2: Active and Passive Ground Support | GEOG 000

While passive support is an appropriate control strategy in many instances, we need an alternative for when it is not. Roof Bolts. One of the most prevalent and effective means of providing ground support is an active support known as a roof or rock bolt. Remember the failure in the layered strata of our example mine?

Prediction of Strata and Support Behaviour During Shortwall Mining …

Semantic Scholar extracted view of "Prediction of Strata and Support Behaviour During Shortwall Mining of Developed Bord & Pillar Working at Balarampur Mine, SECL" by G. Banerjee et al.

Exploitation of developed coal mine pillars by shortwall mining …

Ju and Xu [8] noted that estimation of support resistance in mine workings with large extraction height considers the behavior of the adjacent key strata within the hard overburden without ...

Shield supports in longwall mining | Download Scientific …

The shield support was used for coal mining began from 1970 in China. In the last 30 years, the shield support is widely used in coal mines. The 4-leg shield support ( Fig.7 (a)) was used in the ...

PLANNED INSPECTION PROGRAM GROUND OR …

On occasion, strata support installation information was inconsistent with the information ... mining and support installation tasks are competently performed. Specific findings for this critical control included: All mine operators, except one that was not in operation, had well developed and effectively ...

Research on the Influence of the Key Stratum Position on the Support …

In recent years, in order to increase the coal recovery rate, the large mining height fully mechanized top-coal caving mining has been widely used because it has the advantages of both fully mechanized mining method and large mining height mining method. When this mining technology is used to exploit thick coal seam under upper …

Mining | Special Issue : Mining Strata Control

For mining engineering purposes, strata control is defined as maintaining stability around the mine openings where operations are, or will be, taking place. Thus, mining and geotechnical engineers should …

(PDF) Model of Overlying Strata Structure in Large Mining …

Aiming at the wide range of rock strata movement and collapse, poor stability and high damage rate of the working face support and being prone to crushing of the support in large mining height ...

Design and operation of powered supports for longwall mining

The success of the shield support promoted the application of the longwall mining method in highly faulted and massive strata conditions where caving was difficult to control and where chock and frame supports were inadequate. The purpose of this paper is to provide some insights into optimizing shield design and utilization.

Sustainability | Free Full-Text | Green and …

Ultimately, this method is a reliable way to realize green and sustainable mining. The strata structure protection, the surface subsidence prevention, and coal mine solid waste disposal have been realized at the …

Fracture Mechanisms of Competent Overburden Under High …

Longwall top coal caving (LTCC) is a highly efficient underground mining method in which the lower part of the coal seam is extracted by the cutter and the top coal above the support is fractured by the abutment pressure and falls down under gravity (Fig. 1).This method has been widely used for thick and super-thick coal seam in China due to …

Mechanism and control technology of strong ground

The structural form and stability of the overlying strata will directly affect the ground pressure in extra-thick coal seam mining [11].The traditional theory of mining pressure in a stope mainly focuses on the breaking movement of the immediate roof and key strata in the first layer of the near field (basic roof) [12].With the increasing maturity and …

Study of Strata and Support Behaviour of a Longwall Mine

Strata control in longwall mining has been a grey area of research since its introduction in underground coal mining industry worldwide. A reliable prediction of the caving behaviour of strata and its interaction with the roof support helps in selection of sustainable mining parameters and rational capacity of supports.