DE4311658A1 - Method of making roadside packs and/or support pillars in underground mining, preferably coal mining - Google Patents

Abstract

In a method of making roadside packs and/or support pillars in underground mining, preferably coal mining, in which the construction-material components used as well as the requisite binding agent are delivered underground, are mixed there with water and are then pumped to the operating point, it is proposed to use a floatation tailings suspension from the surface preparation plant of the mine as an essential construction-material component in addition to the binding agent. In a mine, the proposed method on the one hand enables the consumption of construction materials extraneous to the mine to be considerably reduced. On the other hand, the settling pond of the mine is clearly relieved.

Description

The invention relates to a method for producing Line accompanying dams and / or pillars in the underground Mining, preferably hard coal mining, in which the turned add building material components and the required binder mined underground, mixed with water and then used be pumped in place.

It has long been known in mining, underground routes accompanying dams and / or expansion pillars using Fly ash and cement and, if necessary, for other building material components to produce by hydromechanical way. Here, the various materials first pneumatically into the underground Promoted near the place of use, mixed with water and then pumped to the corresponding interconnected operating point.

The supply of a mine with large amounts of the above Non-mining building materials prove to be complex and u. a. due to the transport routes also relatively expensive.

The invention is based, the economy the production of line accompanying dams and / or expansion to improve pillars.

This task is carried out in a method of the type mentioned at the beginning Art solved according to the invention in that in addition to the binder as an essential building material component, a flotation mountain  suspension from the surface processing plant of the mountain works is used. It is expedient that the as Building material component already used flotation mountain suspension pre-thickened to a water content in the course of the treatment, the roughly the amount of setting water required for the underground Use corresponds, so that an additional water supply for Mixing the building material mixture is not necessary.

It has been shown that with a mixing ratio between Flotation piles and cement in a ratio of about 1: 1 themselves Compressive strengths that meet the requirements for early strength Building materials for the production of line accompanying dams in the sub day area are sufficient.

The proposed method is therefore simple Way, flotation mountains as a resource in the mine itself use. In principle, with the exception of the required binder on the procurement of non-mining building material components to be waived.

For the operation of a mine there is another Advantage that the flotations now used as a building material recovery quantities no longer enter the sink pond of the mine need to be directed, creating a noticeable relief and thus a longer usage time of the pond is achieved.

Since the flotation mountains are processed as aqueous Sus pension is incurred, it is very easy to move underground spend because of the hydrostatic pressure of the manhole column can be used in full.

The Ver according to the invention is particularly economical driving in mining operations that already use an infrastructure for a so-called fracture cavity filling are provided.

In the case of filling the fracture cavity (see, for example, DE-PS 34 13 602) the cavities of a fracture field become underground  Mine rooms with one mined from above to below Suspension from flotation mountains and possibly other fillers pressed. By pressing these fillers into the still existing cavities of the fracture offset are able to Compressibility of the breakage fill significantly increased reduce with corresponding positive effects on possible Mine damage above ground.

Through the shared use of the infra provided according to the invention Structure for the filling of fracture cavities for the production of Line accompanying dams and / or extension pillars can be reduce the costs considerably, since now only one Binder supply infrastructure is required. In the practical application is conveniently the Binder taken from an underground intermediate station and via a hose line in the flotation line shortly before the discharge on the embankment planned mix route fed.

Claims (4)

1. Process for the production of line accompanying dams and / or expansion pillars in underground mining, preferably in hard coal mining, in which the building material components and the required binder are conveyed underground, mixed there with water and then pumped to the operating point, characterized in that in addition to a flotation mountain suspension from the surface processing plant of the mine is used as the essential building material component. 2. The method according to claim 1, characterized in that the flotation mountain suspension used as a building material component is set above ground to a water content which corresponds approximately to the water requirement of the setting process

• 3. The method according to claims 1 or 2, characterized in that cement is used as a binder.

4. The method according to any one of claims 1 to 3, characterized records that based on the solids the mixture ratio between flotation mountains and cement to about 1 is set. 5. The method according to any one of claims 1 to 4, characterized records that the required flotation mountain suspension underground an existing supply system for the Fracture cavity filling is removed.