SU874988A1 - Method of mining sulphur from subterranean deposits - Google Patents

Description

(54) METHOD FOR EXTRACTION OF SULFUR FROM UNDERGROUND FARES

I

The invention relates to mining and can be used in the development of sulfur deposits by the method of underground smelting.

There is a known method for extracting sulfur from underground deposits, which includes opening a vertical well hole, feeding coolant into the deposit through the well and pumping molten sulfur to the surface.

There is also known a method for extracting sulfur from underground deposits, which includes opening a sulfur deposit by a well drilled at an angle to the plane of contact of the deposit with roof rocks, feeding the coolant through the well and pumping the molten sulfur to the surface G 21.

A disadvantage of the known methods is low sulfur recovery, especially during the development of steeply dipping deposits.

The purpose of the invention is to increase the recovery of sulfur, when processing mainly steeply dipping deposits.

The goal is achieved by the fact that the coolant is fed into the reservoir over the entire power of the last intersected well.

In addition, the reservoir that opens the reservoir is drilled at an angle of 40-60 to the plane of contact with the reservoir

10 roofing.

Fig. 1 shows a sulfur deposit, in the course of mining, a vertical section; in fig. 2 - from “botanna sulfur deposit, vertical section.

The method is carried out as follows.

Claims (2)

The sulfur deposit 1 opens wells 20 us 2, which drill at an angle, for example, 40-60, to the plane 3 of the contact of the reservoir 1 with roof rocks 4 Opening the reservoir can be carried out by a cluster of wells drilled from one side of the drilling unit. , the columns 5, perforated in their downhole parts along the entire length of their contact with the reservoir 1. Then the coolant is pumped into the columns 5 at 160-16e C under a pressure of 10-12 bar, which is poured out of the perforations of the columns into the reservoir 1 throughout the power of the last no. "and melted ie sulfur. Rising upward, the heat transfer medium melts sulfur throughout the entire section of the hall from its plantar part to the roof. Molten sulfur flows to the downhole part of the well and is pumped out onto the surface. The heat carrier, rushing upwards through the uprising of a steeply dipping deposit, captures a significant amount of sulfur deposit with heating and melting, leaving insignificant interwell wells 6. In this, a significant increase in the sulfur melting zone is observed in the fall of the sulfur deposit. The use of the proposed method for the extraction of sulfur from steeply dipping deposits provides the following advantages as compared with the known methods: a increase in the extraction of sulfur from a steeply dipping ore deposit; b) allows you to work out a large part of crosshole wells; 4 in the cluster location of serodoobny wells at one site. Allows to significantly reduce the cost of building sites and access roads; d) allows to reduce the number of production wells due to the coverage of a larger part of the reservoir with an inclined well. Claim 1. Sulfur extraction method from underground deposits, including opening of sulfur by a well drilled at an angle to the plane of contact of the deposit with roof rocks, feeding coolant into the deposit through the well and pumping molten sulfur to the surface characterized by increasing the recovery of sulfur in the development of predominantly steeply dipping deposits, the coolant is fed into the reservoir over the entire power of the last, intersected well. 2, the method according to claim 1, about tlc h ay and with the fact that the opening well reservoir is drilled at an angle of 40-60 to the plane of contact of the reservoir with the roof rocks. Sources of information taken into account in the examination 1. Arena V. Zh. Sulfur smelting is underground. M., Nedra, 1973, p. 15 2. US patent number 2783986, cl. 299-6, published. 1957.