SOLID FILLING MINING DESIGN METHOD UNDER A WATER BODY

摘要

Disclosed is a solid filling mining design method under a water body, comprising: protected water body hydrogeological characteristic analysis, mining grade and allowable mining degree evaluation, determination of the type of a safety coal and rock pillar and the maximum height of a rock covered water guide fractured zone allowed by the protected water body, design of the maximum mining height sustainable by the water body and a goaf critical enrichment rate, and test of the height of the rock covered water guide fractured zone by utilizing an underground drilling resistivity method, and other relevant methods. During designing the dimensions of the solid filling mining waterproof coal and rock pillar under the water body in a concrete mining district, the goaf enrichment rate of the solid filling mining work surface is rationally designed to control the development height of the water guide fractured zone and meet the required thickness. The method is simple, is easy to operate, has high accuracy, can improve the filling effect and avoid too high filling costs, and has wide practicability.