Active Prefracture Methods in Top Coal Caving Technologies for Thick and Gently Dipping Seams

Клишин, В. И.; Opruk, G.Yu.; Pavlova, L. D.; Fryanov, V. N.

doi:10.1134/s1062739120036689

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Sahoo and Palei [26] propose a new type of roadway support technology using risk-based maintenance. Scholars have also developed constant resistance large-deformation anchor cable, negative Poisson's ratio efect anchor cable, high elongation extendable bolt, and anchor cable pressure-relief device [27,28], clarifed the deformation and failure mechanism of underground rock in coal mines [29], and proposed active prefracture method [30]. In terms of grouting technology, the current grouting theory, grouting materials, grouting process, and grouting quality testing technology have been rapidly developed, such as the development of grouting materials from lime, clay, cement to cement-water glass bi-liquid slurry, and the development of various types of chemical slurry suitable for diferent purposes, resulting in the formation of a wide range of chemical grouting materials for diferent purposes and with diferent properties [31].…”

Section: Introductionmentioning

confidence: 99%

Control Effect Analysis and Engineering Application of Anchor Cable Beam-Truss Structure on Large-Deformation Roadway in Deep Coal Mine

Wang,

Yin,

Zhao

et al. 2024

Shock and Vibration

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In response to the shortcomings of the small support scope of single anchor cable and failure to fully utilize the joint anchoring for surrounding rock, this study summarizes the classification of basic support forms for coal mine roadway surrounding rock and clarifies the main composition and mechanism of anchor cable beam-truss structure. A mechanical model of roadway roof beam under the conditions of no support, single anchor cable support, and anchor cable beam-truss structure support at both ends of the roadway is constructed, and the force and maximum bending moment of roadway roof beam under different support types are compared and analyzed. The study clarifies the bending moment reduction rate of anchor cable beam-truss structure relative to unsupported and single anchor cable support and combines numerical simulation to analyze the response laws of anchor cable beam-truss to prestress distribution and stress shell in roadway surrounding rock. Based on the on-site engineering application of a typical large-deformation mining roadway in a deep coal mine, the important role of anchor cable beam-truss structure in ensuring the safety and stability of surrounding rock in deep high-stress and intense-mining large-deformation roadway is revealed, providing technical references for surrounding rock control of similar conditions in deep roadways.

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Section: Introductionmentioning

confidence: 99%

Control Effect Analysis and Engineering Application of Anchor Cable Beam-Truss Structure on Large-Deformation Roadway in Deep Coal Mine

Wang,

Yin,

Zhao

et al. 2024

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…The simplest mathematical model of a geomedium is a linear elastic model. It is widely used for solving different problems in geomechanics and is actually a basic model [3][4][5]. Mechanics of deformable solids advances in two directions.…”

Section: Introductionmentioning

confidence: 99%

Mathematical models of rock mass affected by high pressure gradients

Ревуженко

Лавриков

2021

E3S Web Conf.

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The authors propose to solve the problems connected with high pressure gradients using a model of a linearly elastic body with a structural parameter. The closed finite difference system of equations is formulated for plain strain deformation conditions. The problem on deformation of rock mass in the vicinity of an underground opening affected by mixed-type gravity-and-tectonic stress field is solved. It is demonstrated that addition of the structure in the solution changes the value of the stress concentration coefficient.

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Coupling control technology of anchoring and unloading in deep intense-mining and large-deformation roadway: a case study

Wang,

Yin,

Kang

et al. 2024

Sci Rep

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In order to control the deformation of surrounding rock in deep high-stress and intense-mining roadways, taking a deep coal roadway with continuous deformation as an example, the characteristics of crustal stress, coal strength, and mining influence of roadway are obtained by underground tests. The combined failure mechanism of coal roadway surrounding-rock is revealed by differential stress of deep and shallow anchor cables. We propose that the improvement of surrounding rock control for coal roadway is adopting the coupling control technology of anchoring and unloading. The stress distribution and evolution laws of lateral surrounding rock of unloading holes are obtained by numerical simulation and theoretical calculation, and reasonable unloading-hole spacing of 4.0 m is comprehensively determined. A mechanical model of roadway roof beam under fixed support at both ends is constructed and the important role of anchor cable beam-truss in controlling the stability of coal roadway is obtained. The rationality of coupling control technology of anchoring and unloading and parameters has been verified by engineering test and mine pressure observation, providing technical references for surrounding rock control in deep intense-mining and large-deformation roadways.

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Active Prefracture Methods in Top Coal Caving Technologies for Thick and Gently Dipping Seams

Cited by 4 publications

References 3 publications

Control Effect Analysis and Engineering Application of Anchor Cable Beam-Truss Structure on Large-Deformation Roadway in Deep Coal Mine

Control Effect Analysis and Engineering Application of Anchor Cable Beam-Truss Structure on Large-Deformation Roadway in Deep Coal Mine

Mathematical models of rock mass affected by high pressure gradients

Coupling control technology of anchoring and unloading in deep intense-mining and large-deformation roadway: a case study

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