Heavy curtain and water curtain combined goaf gas storage cave depot designing method

Abstract

The invention provides a heavy curtain and water curtain combined goaf gas storage cave depot designing method. The heavy curtain and water curtain combined goaf gas storage cave depot designing method comprises the following steps that S1, an underground gas storage depot area for storing natural gas is designated according to the mining data and geological survey data of a mine; S2, multiple roadways are arranged above the underground gas storage depot area; and S3, multiple grouting holes and multiple water curtain holes are drilled in the roadways towards surrounding rock, water and groutare injected into the surrounding rock through the water curtain holes and the grouting holes to form a water curtain and a heavy curtain, and the underground gas storage depot area is sealed. According to the heavy curtain and water curtain combined goaf gas storage cave depot designing method, heavy curtain and water curtain systems are built, grouting is carried out to reinforce the surroundingrock, and holes and cracks are filled to reduce the seepage flow and seepage pressure; and the water curtain system is formed by the water curtain holes, the natural gas storage area is reinforced and sealed, natural gas is prevented from diffusing and leaking around, and the underground gas storages safety of the mine is ensured.

Description

Technical field [0001] The invention relates to the technical field of underground engineering, in particular to a design method for a goaf gas storage cavern in which a curtain and a water curtain are combined. Background technique [0002] my country is the country with the most abundant coal resources, and coal still occupies an absolute position in my country's primary energy structure. In the process of coal mining, a series of tunnels or chambers need to be excavated. The mining tunnels will be destroyed as the mining work is completed. The preparation tunnels and development tunnels remain deep in the ground after the completion of the mining work, as the maintenance work stops. As the underground space is permanently abandoned, the underground chambers constructed with a lot of financial and manpower cannot be fully utilized. [0003] With the increase in environmental protection pressure and technological progress, the trend of low-carbon energy consumption has become inc...

AI Technical Summary

Problems solved by technology

This method does not use gobs for gas storage, does not form a curtain system and how to arrange double-curtain roadways according to the occurrence of ore bodies

Images