Analysis and Prevention Technology of Mine Water Hazard in Roof and Floor Limestone Aquifer of Northern Huanghe Coalfield

Abstract

To study the water hazard problem of the lower coal mining in northern Huanghe Coal Field and formulate the prevention and control methods, by analyzing the main types of water hazards in the area and their impact, it is considered that 11# coal mining is mainly affected by the roof and floor limestone aquifers. At the same time, the two aquifers are closely related to Ordovician limestone. Based on the special hydrogeological conditions of 11# coal in northern Huanghebei Coal Field, the method of “roof limestone curtain intercepting and floor limestone area controlling” was proposed to control the double limestone water damage of roof and floor, and it was applied to the typical mine in the area. In the meantime, the water hazard control effect was discussed. It shows that the treatment effect of the bottom limestone aquifer is good, and the roof aquifer curtain need to be all overlapped to check the interception effect.

Keywords

• mine water hazard
• northern huanghe coal field
• roof and floor limestone aquifers
• prevention control method
• directional drilling