Huating Mei Ye Group Co.,Ltd.
School of Mines,China University of Mining and Technology
China Coal Energy Research Institute Co.,Ltd.

为了进一步研究不规则遗留煤柱群应力分布特征,以山寨煤矿一、二采区的锯齿状遗留煤柱群为研究背景,基于“载荷三带”理论,建立了侧向支承应力估算模型,对锯齿状煤柱群不同区域的应力分布特征进行了分析;同时运用数值模拟研究方法,分析了锯齿状煤柱群形成前后,应力场的演化规律;通过定位分析锯齿状遗留煤柱群的微震监测数据,验证了理论推导和数值模拟的可靠性。研究结果表明:山寨煤矿锯齿状遗留煤柱群内部应力分布并不均匀,煤柱内部支承应力叠加程度与其宽度成正相关,宽度最小的区域一煤柱,支承应力叠加程度最高,其冲击危险性也最高;相较于无保护层开采工作面,在保护层下开采对于锯齿状遗留煤柱群的影响相对较小。

To further study the stress distribution characteristics of the irregular residual coal pillar group,this paper takes the jagged residual coal pillar group between the first and second mining areas of Shanzhai Coal Mine as the background of the study,and establishes a lateral support stress estimation model through the theory of the three zone structure loading,and investigates the stress distribution characteristics of the different areas of the jagged residual coal pillar group. Furthermore,numerical simulation is conduced to analyze the evolution law of the stress field before and after the formation of the jagged residual coal pillar group. The reliability of the theoretical derivation and numerical simulation is verified by positioning and analyzing the microseismic monitoring data. The results indicate that the internal stress distribution of the jagged residual coal pillar group in Shanzhai Coal Mine is not uniform,and the degree of superposition of internal abutment stress in coal pillar is positively correlated with its width. The area with the smallest pillar width has the highest degree of superposition of abutment stress in coal pillar,and its burstingrisk is also the highest. Compared to the unprotected mining face,mining under the protected layer has relatively less influence on the jagged residual coal pillar group.