Artificial retaining dam for coal mine underground reservoir and connecting method of artificial retaining dam and coal pillar dam bodies as well as surrounding rocks

A technology for underground reservoirs and retaining dams, which is applied in the direction of dams, arch dams, mining equipment, etc., can solve the problems of difficult groove construction and inconvenient control of grouting, and achieve the effect of improving anti-skid performance and strengthening connection

Active Publication Date: 2013-12-04
CHINA SHENHUA ENERGY CO LTD
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Problems solved by technology

[0005] At present, there is no construction process and example reference for the contact between the artificial retaining dam and the coal pillar dam of the coal mine underground reservoir. Anti-skid performance of artificial retaining dams in coal mine underground reservoirs

Method used

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  • Artificial retaining dam for coal mine underground reservoir and connecting method of artificial retaining dam and coal pillar dam bodies as well as surrounding rocks
  • Artificial retaining dam for coal mine underground reservoir and connecting method of artificial retaining dam and coal pillar dam bodies as well as surrounding rocks
  • Artificial retaining dam for coal mine underground reservoir and connecting method of artificial retaining dam and coal pillar dam bodies as well as surrounding rocks

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Embodiment Construction

[0032] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, the coal pillar dam body 2 is to protect the surface landform, ground buildings, structures and main shafts, prevent subsidence, separate ore fields, well fields, aquifers, fire areas and fracture zones, etc. Part of the ore body plays a supporting role and is located on the left and right sides of the auxiliary roadway 1. Surrounding Rock 3 (see image 3 ) is formed when the auxiliary roadway 1 is excavated, and is located on the upper and lower sides of the auxiliary roadway 1. Adjacent auxiliary roadways 1 are communicated through connecting roadways 11 . When the working face is mined, the goaf 4 is formed, and the overlying strata of the auxiliary roadway 1 cascades, and the auxiliary roadway 1 and the goaf 4 together form an underground reservoir. In the present invention, the coal pillar...

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Abstract

The invention discloses an artificial retaining dam for a coal mine underground reservoir. The artificial retaining dam is embedded into coal pillar dam bodies and surrounding rocks around an auxiliary roadway, and the cross section of the artificial retaining dam is arc-shaped. The concave surface of the arc shaped artificial retaining dam is towards the underground reservoir. The invention also discloses a connecting method of the artificial retaining dam for the coal mine underground reservoir and the coal pillar dam bodies as well as the surrounding rocks. The connecting method comprises the following steps of selecting a damming position of the artificial retaining dam among the coal pillar dam bodies in the auxiliary roadway; slotting in the coal pillar dam bodies and the surrounding rocks around the auxiliary roadway to form a groove; driving a plurality of anchor rods into the coal pillar dam bodies and the surrounding rocks in the groove; spraying concrete at a high pressure and forming the artificial retaining dam in the groove. The artificial retaining dam is embedded into the coal pillar dam bodies and the surrounding rocks, so that connection between the artificial retaining dam and the coal pillar dam bodies as well as the surrounding rocks is reinforced and antiskid performance of the artificial retaining dam is improved.

Description

technical field [0001] The invention relates to the intersecting fields of coal mining and water conservancy engineering, in particular to an artificial retaining dam of an underground reservoir in a coal mine and a method for connecting it to a coal pillar dam body and surrounding rock. Background technique [0002] Coal resources in the energy "Golden Triangle" (Shanxi, Shaanxi, Mongolia, Gansu and Ningxia) are characterized by shallow burial depth, thin bedrock, and thick coal seams. In 2011, the coal output in this area was 2.382 billion tons, accounting for 67.7% of the country's total output. It has become my country's coal resource main producing area. However, the ecological environment of the western "Golden Energy Triangle" is fragile. The region has long-term drought, water shortage and uneven temporal and spatial distribution. Taking northern Shaanxi as an example, this area is located inland, with little precipitation and large evaporation. The per capita water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/10E21F17/00
CPCE02B3/10E21F17/103E02B7/12E21F17/00B65G5/00
Inventor 顾大钊
Owner CHINA SHENHUA ENERGY CO LTD
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