隔水层等效厚度的评价确定

The evaluation of equivalent thickness of water-resisting layer

矿井带压开采是解放受底板突水威胁的下组煤的有效方法之一,对下组煤底板突水危险性的评价是确保煤矿安全开采的重要手段,其中下组煤底板隔水层阻隔水能力的确定是评价矿井突水危险性的重要因素,但是在突水危险性评价中隔水层的等效厚度往往难以有效确定。为了评定隔水层等效厚度,以新阳井田为例,从岩性组合、岩层抗压强度与隔水能力、底板采动破坏深度等多个方面综合研究,最终确定评价了井田下组煤底板隔水层的等效厚度,为类似煤矿下组煤底板隔水层等效厚度的确定提供了综合的评价方法。

Mining with pressure is one of the effective methods for the coal mining under the threat of water inrush from floor, the group under the coal floor water inrush risk evaluation is one of the important means to ensure mine safety production, and the coal floor water-resisting layer block the determination of water capacity is an important factor of mine water inrush risk evaluation, but the equivalent thickness of water-resisting layer in the water inrush risk evaluation is often difficult to determine effective.In order to assess the equivalent thickness of water-resisting layer, Xinyang mine as an example, from the compressive strength of the lithologic combination, rock formations and waterproof ability and Comprehensive research on the failure depth of floor mining and so on, and finally determine the equivalent thickness of the coal floor of the Ida under the coal floor, for the similar coal mine group under the coal floor water-resisting layer provides a comprehensive evaluation method of determining the equivalent thickness.