深井软岩巷道地压控制试验研究

Experimental Research on Controlling Ground Pressure of Roadway in Soft Rock in Deep Mine

为解决煤矿深井巷道地压的控制难题,基于某采区总回风下山在复杂地质条件及高应力作用下变形、破坏严重的情况,对深井巷道围岩的物理力学性质、矿压显现及机理进行了分析论证,提出了基于"固帮减跨"治理深井巷道底臌的联合支护方案,并对该巷道采取锚网索联合支护和锚注的技术措施进行了修复加固的试验研究,提高了巷道支护强度,控制了动压巷道的破坏,保证了巷道的稳定,达到了理想的支护效果。

In order to solve the technical problem of controlling ground pressure of roadways in deep mine, test research on physical mechanics features of surrounding rocks of roadway in a deep coal mine is carried out based on the fact that one general air-return entry in composite geological conditions is damaged and even destroyed because of high pressure. An analy sis on demonstration of pressure behavior and mechanism of surrounding rocks is conducted. The principle and support plan of reinforcing sides and reducing span for controlling the floor heave is provided. With the technical measures of the combined support and grouting, the roadways support strength is bettered. The destruction in surrounding rock of roadway because of dy namic pressure is controlled and rational support results were reached and good benefits are obtained.