Sealing material and sealing method for water inrush well breach in deep shaft working face of railway tunnel

Abstract

The invention discloses a railway tunnel deep shaft working face water burst and mine flooding breach blockage material and a blockage method and aims at being used for blocking working face breaches.The railway tunnel deep shaft working face water burst and mine flooding breach blockage material is prepared from cement, water, an SBT-NDA anti-dispersion agent and an HME-III low alkalinity type swelling agent with the mass ratio being 1 to (0.8-1) to (0.02-0.03) to (0.03-0.05); the working face is at the position with the depth larger than 300m underwater; and the water inflow of a breach islarger than 200m3 / h. The blockage material has better anti-dispersion performance, ensures that the material does not perform segregation and is not diluted in deep water, has better self-leveling performance and ensures to form a cylindrical water retaining cushion in the deep water.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and particularly relates to a plugging material and a plugging method for water inrush, flooding, and breach at the working face of a deep shaft of a railway tunnel. Background technique [0002] At present, after water inrush and flooding occurred in mines at home and abroad, the methods of blocking water inrush are divided into: (1) using pumping and drainage equipment to forcefully discharge to the inrush mouth to construct a water-stop pad; (2) pre-grouting plugging of deep holes on the ground (3) The freezing construction method is adopted; (4) The water-stop cushion is constructed by underwater concrete. Among them, method (1) is relatively simple, but for flooded well depths greater than 300m and water inflow greater than 200m 3 / h, the current pumping and drainage and supporting facilities are difficult to guarantee, and the operation safety risk during the construction proces...

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Problems solved by technology

The method (1) is relatively simple, but for the flooded well depth greater than 300m and the water inflow greater than 200m 3 / h, the current pumping and drainage and supporting facilities are difficult to guarantee, and the operation safety risk during the construction process is extremely high, and the loss of the stratum and the expansion of the breach range cannot be caused by a large amount of pumping and drainage; method (2) ground deep hole pre-grouting method The construction period is long, the cost is high, and the construction is difficult. With the increase of the depth of the wellbore, it becomes more and more prominent and it is impossible to accurately expose the breach fissures and achieve the purpose of sealing the breach. Method (3) The freezing method construction has a long recovery period and a large investment for the wellbore, and after the wellbore is thawed Leakage and other problems are prone to occur; method (4) When the transportation distance of underwater concrete is greater than 200m, the concrete is prone to segregation, pipe plugging, diluted by groundwater, and the pouring quality is difficult to guarantee

[0003] When the above-mentioned methods are used to block the water inrush and breach of the vertical shaft, the requirements for the depth of the shaft's flooding, water inflow and stratum are relatively high, and the construction period of the ground pre-grouting and freezing method is long and the construction cost is high, which is difficult to meet the current rapid railway construction. The purpose of construction: with the rapid development of underground engineering in recent years, the construction of deep and large shafts is increasing day by day, and water inrush and flooding of wells will inevitably occur during the construction process. 3 / h well flooding accident, currently there is no fast and effective plugging material and method

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