铀矿床“三下”开采试验采场地压和岩层移动观测研究

OBSERVATION OF GROUND PRESSURE AND ROCK MOVEMENT IN URANIUM MINE UNDER RIVER AND BUILDINGS

本文介绍铀矿床“三下”开采试验采场地压和岩层移动观测研究的情况。 采场地压、覆岩破坏、水文变化、地表和建筑物移动变形等情况是检验“三下”开采效果的一些重要参数。为了掌握这些参数,利用支柱测力计、顶板动态仪、测缝计、光应力计、大应变计、单点位移计、水准仪、应力计等仪器,分别在井下有关地段和地表、民房等地进行了移动变形等观测,获得了大量数据。两年多的观测结果表明,采场土覆岩层没有产生垂直方向和水平方向的位移或错动,顶板压力不大,地表及建筑物没有发生任何变化。证明采用下向胶结充填采矿法在莲花矿段进行“三下”开采的试验是成功的。文章介绍的观测方法有参考价值。

The observations of ground pressure change, rock movement and deformation were made for the surface, buildings and underground parts by various kinds of instruments. The observation results show that there is no movement in cover rock over the stope in vertical and horizontal directions, the pressure of toprock is not great,and no change on the surface and buildings occurs. The data indicate that the test is successful to use underhand cut and fill mining method for developing Lianhua mine under river and buildings.