Composition for plugging drowned fractured rocks

 

(57) Abstract:

The invention tositsa to mining, in particular to the plug, and is designed to create a waterproofing veils flooded in fractured rocks at low and subzero temperatures of the rocks. The purpose of the invention is the improvement of the quality of water shut-off and a wider range of temperatures companyremoval array of cement composition on the basis of waste hydraulic processing diamondiferous rocks. The objective is achieved by the fact that in cement mortar containing waste hydraulic processing diamondiferous rocks, cement, sodium chloride and water, optionally enter a ground zeolite in the following ratio, wt.%: waste hydraulic processing diamondiferous rocks 22,85 - 30,65; cement 7,25 - of 10.58; zeolite 2,41 - of 10.58; sodium chloride 0,59 - 16,58; water the rest. table 1.

The invention relates to mining, in particular for plugging watered fractured rocks to create a waterproofing curtains at low and subzero temperatures of the rocks.

Known composition for plugging [1], comprising aluminous cement and zeolite as an additive governing the kinetics of strukturanalyse [2], includes wt.%:

Waste hydraulic

processing elmatador-

containing rocks 26,1-31,0

The cement of 12.5 to 13.1

Sodium chloride 4,7-5,5

Water the Rest

The composition capable of hardening under conditions of saline water at subzero temperatures, however, has some limitations on the application. So, due to the low kinetics of structure formation its successful application is guaranteed only in the peripheral zones of fracture. In areas of the same tectonic faults composition is not effective. In addition, the mineralization (89,0 kg of sodium chloride in 1 m3mud is insufficient when working in horizons with temperatures below -7aboutAt a temperature above -7about(Deep horizons in the permafrost) this mineralization is unnecessary.

The purpose of the invention is improving the efficiency of water shut-off and a wider range of temperatures companyremoval array.

The goal is achieved in that the composition additionally injected powdered zeolite in the following ratio, wt.%:

Waste hydraulic

processing elmatador - containing rocks 22,85-30,65 Cement 7,24-Of 10.58 Zeolite 2,41-Of 10.58 Chloride natih (90aboutC) and negative (up to -21,2aboutC) temperatures.

Preparation of composition for plugging is as follows.

From prodovol part of hydraulic mine dump selected waste processing plant; selected, the suspension is adjusted to a density 1240-1330 kg/m3; the resulting suspension is injected sodium chloride in an amount necessary to prevent freezing at a given temperature, but in the range of 10.0-258,3 kg per 1 m3suspension; mixing the cement with powdered zeolite with a ratio of cement: zeolite from 1:0.3 to 1:1; after complete dissolution of sodium chloride in the suspension is injected under stirring cement-zeolite mixture in an amount of 160-360 kg per 1 m3suspension.

The specified content of the components corresponds to the limits of the optimal composition for plugging. The optimum content of the components installed on the basis of the necessary requirements for the properties of cement composite systems on their pumpability and structural-mechanical characteristics of the established Norms of technological designing WNTP-6-76.

In table. 1, 2, 3 shows comparative data of the main parameters of cement slurry composition of the prototype and of the exploring of the document.

As can be seen from the above data, the main parameters of the invention and within the optimal proportions of the components satisfy regulatory requirements. Moreover, by increasing the content of zeolite in the proposed composition of the plastic increases strength after 4 h of stabilization.

Fast curing will allow using the minimum amount of materials to create grouting curtain in zones of tectonic faults, cracks large erection.

At the same time if it is not necessary to achieve rapid curing, it is possible to obtain a mixture with characteristics similar to the properties of the prototype with less consumption of cement.

When the content of components in the compositions is less than the lower optimum limit the risk of leaching solution from cracks in the dynamic pressure of the groundwater due to the low values of initial plastic strength and static shear stress. Plastic strength after 10 days also below standard.

When the content of component greater than the upper optimum limit the initial SNA and plastic strength does not satisfy the condition pumpability and can not be applied, in spite of negative temperatures showed the resilience of the invention at temperatures down to -20aboutWith at the appropriate mineralization of the initial suspension.

The structure of the prototype is stable at a temperature of 0 to +5aboutWith, where salinity is excessive and when t = 4 - -7aboutFrom where mineralization corresponds to the freezing in this area. At -18aboutWith the composition of the prototype freezes. Freezing clinicamente mixture is accompanied by a significant increase, which may lead to an increase in the duty cycle of the array.

Thus, a new composition for plugging is more effective water shut-off in terms of large cracks opening and has a wider range of application temperature of a rock in comparison with the composition of the prototype and other famous Tampa - capacity solutions.

COMPOSITION FOR PLUGGING DROWNED FRACTURED ROCKS, including waste hydraulic processing diamondiferous rocks, cement, sodium chloride and water, characterized in that, to improve the efficiency of water shut-off and expansion of the temperature range companyremoval array, the composition further comprises zeolite in the following ratio, wt.%:

Waste hydraulic processing almazosoderzhashchego

 

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