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为掌握采空区侧向瓦斯卸压带的分布特征,提出了基于侧向支承压力的煤层瓦斯卸压带边界判定方法,并采用数值模拟手段,对采空区侧向支承压力的演化规律进行了模拟研究。结果表明:采空区侧向瓦斯卸压带宽度随煤层采高、工作面斜长的的增加而增大,但受煤层采高影响最为明显;缓倾斜煤层采空区侧向瓦斯卸压带宽度不能完全覆盖沿空掘巷实体煤侧15 m范围煤体,仍需对巷道实体煤侧15 m范围煤体执行区域综合防突措施。
In order to grasp the distribution characteristics of the lateral gas pressure relief zone in the goaf, a method to determine the boundary of coal gas pressure relief zone based on the lateral support pressure is proposed. By numerical simulation, the evolution law of lateral support pressure in the goaf Simulation study. The results show that the width of lateral gas pressure relief zone in goaf increases with the increase of mining height and working face inclination, but it is most obviously influenced by coal mining height. The lateral gas pressure relief zone The width can not completely cover the 15m coal body along the roadway along the real side of the roadway, and the comprehensive prevention of outburst is still required for the coal body within 15m of the real coal side of the roadway.