基于水诱因的软岩劣化效应工程特征与控制技术

Engineering characteristics and control technology of soft rock deterioration effect based on water inducement

为解决内蒙古上海庙矿业膨胀性富水软岩工程劣化技术难题,开展了含水率对岩石力学性质影响实验,发现岩石自身物理力学性质是工程劣化的内因,水则是外部诱因;据此提出"治软先治水"、"大水防控小水管理"理念,采取疏干开采、底拱隔水、漏斗接水、深挖水窝、广布雨棚、软管导流、集中排放、砼喷浆封闭等技术措施。工程实践表明:巷道断面收敛率由40.752%降低到10.673%;回采效率由8.1万t/月提高到46.3万t/月;掘进效率由190.6 m/月提高到520.3 m/月。

In order to solve the technical problem of soft rock engineering deterioration with expansive water-rich in Inner Mongolia Shanghaimiao Mining Co., Ltd., the experiment of the influence of water content on the mechanical properties of rock was carried out. It is found that the physical and mechanical properties of rock are the internal cause of engineering deterioration,while water is the external cause. Based on this, the concepts of "soft water treatment first"and "large water prevention and control small water management"are proposed, some technical measures are taken, such as drainage and mining, bottom arch water-proof, funnel water-connecting, deep-digging water nest, wide-spread awning, hose diversion, centralized drainage, concrete shotcrete sealing, etc. The engineering practice shows that the convergence rate of roadway section decreases from 40.752% to10.673%, the recovery efficiency increases from 81,000 t/mon to 463,000 t/mon, and the tunneling efficiency increases from 190.6 m/month to 520.3 m/month.