School of Energy Science and Engineering, Henan Polytechnic University

为解决塔山矿区段煤柱造成资源浪费严重、巷道矿压显现强烈等问题,采用相似模拟的方法对特厚煤层综放工作面回采后侧向支承压力分布特征进行研究,为塔山矿沿空掘巷煤柱留宽度优化设计提供理论依据。结果表明:塔山矿8206工作面煤体侧向支承压力影响范围为60~70 m,其应力降低区范围为11 m,应力峰值为41 MPa,位于煤壁内30 m处,应力集中系数为3.3;侧向支承压力影响范围为60~70 m。相似模拟结果与极限平衡理论计算结果、现场微震监测结果一致,从而得出当煤柱宽度小于6 m时巷道处在应力降低区内,即区间煤柱宽度为6 m。

In order to solve the serious resource waste caused by sectional coal pillars, serious mine strata pressure behavior in the gateway and other problems in Tashan Mining Area, the similar simulation method was applied to study the lateral support pressure distribution features after the mining of the fully- mechanized top co al caving mining face in ultra thick seam and provide the theoretical basis to the optimized design of the coal pillar width for the gateway driving along the goaf in Tasha n Mine. The results showed that the lateral support pressure influence scope of No. 8206 Coal Mining Face in Tashan Mine was 60 ~ 70 m, the stress reduced zone wa s 11 m, the stress peak was41 MPa in the location of 30 m in front of the coal wall and the stress concentration coefficient was 3. 3. The similar simulation results and |i mit balance theoretical calculation results were the same to the site seismic monitoring and measuring results. Thus when the coal pillar width was less than 6 m and th e gateway was in the stress reduced zone, the coal pillar width obtained was 6 m.

国家自然科学基金煤炭联合基金资助项目(U1261207)；河南理工大学博士基金资助项目(648332)；