膏体充填工作面底板破坏深度研究

Study on the broken depth of floor failure on the mining face with paste filling

为了研究工作面膏体充填后对底板承压水的防治效果,需对底板破坏深度进行测试.通过单孔恒水压法对底板破坏情况进行测试,得出了采用膏体充填后完整底板最大破坏深度小于5 m,断层影响处底板最大破坏深度小于12 m.而采用垮落法开采时,由经验公式法得出的完整底板最大破坏深度为9.1 m,即采用膏体充填后完整底板的破坏深度下降了46%.该研究可为测定底板破坏深度提供参考依据.

To study the control effect of confined water after paste filling on the mining face,the depth of floor failure needs to be tested.By the method of water to one drilling at constant pressure,some results were obtained as following： the maximum broken depth of complete floor with paste filling mining is less than 5 m,and the maximum broken depth of floor that was affected by fault is 12 m.However,the maximum broken depth of complete floor is 9.1 m by the empirical formula without paste filling,so the damage degree of complete floor was reduced by 46%.The study are of very important reference vaule on the broken depth of floor.