覆岩离层分区隔离注浆充填减沉技术的理论研究

分析了关键层下离层动态发育对离层充填的影响，针对目前离层区充填工艺不能阻止覆岩关键层初次破断的问题，提出了“覆岩离层分区隔离注浆充填”技术，它综合离层充填与条带开采技术的优点，通过离层区充填置换或减小分区隔离煤柱宽度，使“离层区充填体+关键层+分区隔离煤柱”形成共同承载体，从而达到有效减缓地面沉降的目的，提高了煤层采出率，促进了覆岩离层充填减沉技术的发展.采用数值模拟方法对离层分区隔离注浆充填原理作了进一步证实，并对其适用条件进行了分析.

Research of isolated section-grouting technology for overburden bed separation-space to reduce subsidence

The effect of overburden separation dynamic development under key stratum on grouting for bed separation space was analyzed, in order to deal with the problem that the current bed separation grouting technology can not prevent the key stratum from breakage, put forward the isolated section-grouting technology for overburden bed separation space, integrated the virtue of grouting for bed separation space and partial extraction, the bed separation grouting bodies, key stratum and isolated section pillars were made to constitute the load-carrying body all togeth- er, and to reach the purpose of reducing subsidence effectively, increase the coal seam extraction ratio, and accelerate the development of isolated section-grouting technology for overburden bed separation space. Made sure the interior principle of isolated section-grouting for overburden bed separation space by numerical simulation and analyzed its aoolicable conditions.