深部破碎软岩巷道松动圈确定及支护

Identification and Supporting of the Broken Zone in Fractured Soft Rock Surrounding a Deep Roadway

深部矿井巷道掘进过程中,应力逐渐升高,节理裂隙发育,锚喷支护中锚固深度不能达到围岩稳定范围,锚固端处于松动圈破碎岩体内,锚固力极低或丧失。为此,提出利用现场物探和数值模拟相结合的方法,判断松动圈范围,确定稳定、完整岩体深度,优化锚索支护设计,采用锚网索与U型钢支架协同支护,以控制破碎软岩巷道支护失效的问题。

In the process of roadway drivage in deep mine,the stress is increased gradually,the joint fissures are developed.The anchorage depth can not reach the range of stability of surrounding rock, the anchor end is located in a loose circle broken rock mass,the anchoring force is extremely low or loss. In order to solve the above roadway supporting problem,the geophysical prospecting method and numeri-cal simulation method is adopted to determine the loose circle range and the depth of stability and integri-ty rock mass,and optimize the design of the anchor rope supporting.The collaborative supporting method of anchor wire rope and U -shape steel bracket is adopted to control the supporting failure problems of soft rock roadways.