The Stability of Roadway Groups under Rheology Coupling Mining Disturbance

Abstract

The deep roadway groups play an important role in transportation and ventilation in coal mine production. Therefore, it is very important to comprehensively analyze the coupling effect of rheological deformation and coal mining on the stability of the roadway groups. In this paper, the disturbance effects of different stop-mining lines on roadway groups under long-term rheology were investigated by numerical simulation, and the failure mechanism of roadway groups with large sections and multiple disturbances in a deep well was revealed. The results show that the long working face will lead to the collapse of key strata, and the influence range will spread to the adjacent roadway groups. When the distance between the working face and the stop-mining line is 100 m, the roadway groups cannot be affected by the working face mining, and the reserved width of the coal pillar can be determined to be 100 m, which increases the stability of the roadway’s surrounding rock and maintains the mine safety production. This paper aims to provide a reference for groups design and control under similar conditions.

Study on Characteristics of Front Abutment Pressure and Rational Stop-Mining Coal Pillar Width in Large Height Working Face

“…Feng et al explored the reasonable width of SMCPs based on the internal stress of the coal pillar, vertical stress of the MRSR, and abutment pressure characteristics under different overburden-type conditions in extra-thick coal seams [21,22]. Bai et al determined the location of the stopping line of the double-panel mining face based on the range of mining influence, the deformation law of the surrounding rock, and the peak coefficient of vertical stress of the coal pillar in the main road group [23][24][25]. Summarizing the above research results, the FAP is the main influencing factor on the width of SMCPs.…”

The J2 evolution model and control technology of the main roadway surrounding rock under superimposed influence of double-coal seam mining

“…The superposition of the coal seam stress field is not only affected by the spacing between two coal seams but also closely related to the arrangement of the coal face (can be roughly divided into two types:"+" type and "−"Type) [25][26][27] . Some scholars have studied the behaviors of rock pressure, such as rock bursts, which may be caused by complex stress distribution under the condition of multi-seam mining, the control method which can be applied to engineering practice is put forward [28][29][30][31] .…”